X f fourths to horace b



UNITED STATES PATENT OFFICE.

HOMER L. BOYLE, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR OF THREE- FOURTHS TO HORACE B. PECK, CHARLES E. VVESTLAKE, AND MOSES J AN- DORF.

HORSESHOE-CALK SHARPENER.

SPECIFICATION forming part of Letters Patent No. 416,394, dated December 3, 1889. Application filed February 26, 1889. Serial No. 301,278. (No model.)

To all whom it may concern.-

Beit known that I, HOMER L. BOYLE, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Horseshoe-Gall: Sharpeners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled to' in the art to which it appertains to make and use the same, reference being had to the accompanying drawings.

My invention relates to a portable horseshoe-calk sharpener adapted for sharpening I 5 horseshoe toe and heel calks without removing the shoes from the horses feet, and will be easily understood on consulting the drawings, in which Figure 1 shows an elevation, and Fig. 2 a

longitudinal section on-the line was of Fig. 1,

and in which similar letters refer to corresponding parts in each of the figures.

The body of the device consists of the stock B, adapted for grasping with the hand, and

to which all the parts are attached.

A is a revolving cutting or grinding cylin-' der, of any suitable material, (preferably of steel, hardened,) and is journaled to B in suitable bearings (preferably eyebolts) D D, having adj nst-ing-nuts E E and providedwith compressing-springs K K, (preferably of rubber or other suitable m aterial,) for imparting an elastic pressure to the cutting-cylinder A. The gage G, having the slot I and set-screw H,

' 3 5 is arranged between the cylinder and stock,

and is adapted to engage the point of the calk being sharpened and prevent it from wedgin g in the machine and to stop it at the proper place to prevent the calk being ground more than is desired.

L L are guides for preventing the gage from moving later lly.

F F are cup-pointed set-screws for engaging the toe of the hoof when sharpening the toe-calk.

The operation of my device is as follows: The calk to be sharpened is placed upon the stock in front of and in contact with the cut- 7 ting-cylinder, which, being revolved upon its axis, grinds off the corner, sharpening it. The springs, communicating elasticity to the cylinder, prevent binding and stopping of the motion, and the gage, being properly adj usted, stops the calk at the proper place to prevent its being ground too much and from wedging the machine.

What I claim, and desire to secure by Letters Patent, is-

1. The combination of the stock B, provided at its end with the hoof-engaging screws F, the bearings D for the pivots of said cylinder, having threaded shanks and extending through the stock, the nuts E on said shanks, and springs K, interposed between said nuts and stock. f

2. The combination of the stock B, provided at its end with the hoof-engagin g screws F, the bearingsD forthe pivots of said cylinder, having threaded shanks and extending through the stock, the nuts E on said shanks, the springs K, interposed between said nuts and stock, the gage G, arranged betweensaid stock and cutting-cylinder, and the guides L, arranged at each end of said cylinder, substantially as described.

In testimony whereof I affixmy signature in presence of two witnesses.

DENNIS L. ROGERS, LUTHER V. MOULTON. 

